55002661 has 4 divisors (see below), whose sum is σ = 62860192. Its totient is φ = 47145132.

The previous prime is 55002631. The next prime is 55002677. The reversal of 55002661 is 16620055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55002661 - 2⁷ = 55002533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55002611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3928755 + ... + 3928768.

It is an arithmetic number, because the mean of its divisors is an integer number (15715048).

Almost surely, 2^55002661 is an apocalyptic number.

It is an amenable number.

55002661 is a deficient number, since it is larger than the sum of its proper divisors (7857531).

55002661 is an equidigital number, since it uses as much as digits as its factorization.

55002661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857530.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 55002661 is about 7416.3778895091. The cubic root of 55002661 is about 380.3013791024.

The spelling of 55002661 in words is "fifty-five million, two thousand, six hundred sixty-one".